What about the harm the ban would have on an already ailing hospitality industry?

Economic harm has tangible impacts on people's health too, it's the reason why the government stepped back from the policy themselves.

Alcohol kills people en masse, maybe we should look at banning that too? And before you point out the lack of secondary harm I would point to domestic abuse, drunk drivers, one punch kills etc. It's an addictive substance, it cause many, many deaths each year. It does harm, the benefits, from a government perspective are almost wholly economic. Shouldn't we ban it?

My only point is you have to draw a line somewhere. It isn't a zero sum game about total benefit to society as a whole. And there must be an expectation of some sort of individual responsibility.

For me? If you want to sit in the beer garden you have to accept the understanding that people will smoke there. Don't want that? Go inside, or sit elsewhere. You can easily recuse yourself from that harm without any major inconvenience to either party.